一选育经过及试种情况“湘矮早九号”原名72-25,是湖南省农业科学院水稻所1970年用“691”(即IR8)作母本,“湘矮早四号”作父本杂交,采取翻秋和冬季温室栽培等方法一年三代加速选育,于1972年第六代定型的一个迟熟早秈矮杆品种。1973年参加我所早稻品比试验,小区亩产1014.7斤,比对照种“湘矮早四号”增产7.4%,74年和75年参加全省早稻区域试验两年的试 A selection of breeding and test situation “Xiang short morning nine,” formerly known as 72-25, is the Hunan Academy of Agricultural Sciences rice in 1970 with “691” (IR8) as the mother, “Xiang short morning on the 4th” as the father This hybridization, to take autumn and winter greenhouse cultivation and other methods of accelerated selection of three generations a year, in the sixth generation in 1972, a late maturing indica dwarf varieties. In 1973 I participated in the early rice ratio test, small plots per mu 1014.7 kg, compared with the control of “Xiang short morning four” an increase of 7.4%, 74 and 75 years to participate in the province’s early rice regional trial of two years of trial